222121020331 has 4 divisors (see below), whose sum is σ = 253852594672. Its totient is φ = 190389445992.

The previous prime is 222121020311. The next prime is 222121020343. The reversal of 222121020331 is 133020121222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222121020331 - 2³³ = 213531085739 is a prime.

It is a super-2 number, since 2×222121020331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222121020299 and 222121020308.

It is not an unprimeable number, because it can be changed into a prime (222121020311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15865787160 + ... + 15865787173.

It is an arithmetic number, because the mean of its divisors is an integer number (63463148668).

Almost surely, 2^222121020331 is an apocalyptic number.

222121020331 is a deficient number, since it is larger than the sum of its proper divisors (31731574341).

222121020331 is an equidigital number, since it uses as much as digits as its factorization.

222121020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31731574340.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 222121020331 its reverse (133020121222), we get a palindrome (355141141553).

The spelling of 222121020331 in words is "two hundred twenty-two billion, one hundred twenty-one million, twenty thousand, three hundred thirty-one".